This week we are discussing fitness and how it helps us be more productive. Want to intensify your workout in the new year? Try chilling your muscles in a cryotherapy chamber. If that's not your cup of tea, strap some electric stimulators onto your biceps while you're pumping iron. Listed are just some of the latest, highest-priced fitness fads, yet the workouts seeing the most growth are actually some of the oldest around. …see more